Commonly confused
Incomplete dominance vs codominance
Dono simple dominant-recessive rule ko todte hain. Sirf ek farak hai: beech wala form dono ko mix karta hai, ya dono ko ek saath dikhata hai?
Incomplete dominance
Red flower × white flower se pink aata hai. Pink koi naya gene nahi hai. Ye red aur white ka mix hai. Do pinks cross karo to red aur white wapas aate hain (1 : 2 : 1). Mix hi clue hai.
Codominance
Blood group AB. A marker aur B marker dono red cells par poore, side by side baithe hote hain. Beech wale form me kuch mix nahi hota. Tumhe dono saaf dikhte hain.
Trap yeh hai
Students inhe isliye swap karte hain kyunki dono 1 : 2 : 1 ratio dete hain aur dono simple dominance todte hain. Ek sawaal decide kar deta hai: beech wala form mix hai, ya dono traits saath? Pink ek mix hai, to incomplete dominance. AB dono dikhata hai, to codominance.
Ek quick check
RR red hai, rr white hai, aur Rr pink hai. Ye hai:
- ACodominance
- BIncomplete dominance
- CComplete dominance
- DA test cross